What is the use of recycling old mobile phones?

Mobile Phone Recycling

Mobile Phone Screen

Touch Material - The material widely used in touch control is indium tin oxide, which has the characteristics of conductivity and transparency. Due to the large-scale production of smartphones, the storage capacity of indium elements is difficult to meet the status quo, so recycling indium from mobile phone screens is an important channel. Screen glass - its main component is silicon dioxide. At present, some high-end mobile phones in the market also use more wear-resistant and harder alumina, but due to the high production cost, it is not widely used. In order to make the screen have a more vivid display effect, lanthanum is also used, one of the 17 rare earth elements. There are 17 kinds of rare earth elements in total, and they also have different applications on mobile phones. For example, another super magnetic rare earth element, neodymium, is used on speakers and front sensors.

Mobile Phone Circuit Board

From a ton of used mobile phones, at least 150 grams of gold, 100 kilograms of copper, and 3,000 grams of silver can be extracted, with a total value estimated at nearly 100,000 yuan, and most of these high-value elements are collected from the circuits of mobile phones plate. In addition, many chips are distributed on the circuit board, and there is non-metallic element silicon. Crystal silicon is obtained through purification, and after processing, the recycled material-single crystal silicon can finally be accepted. Single-crystal silicon can be mainly used to make semiconductor components.

Mobile Phone Battery

Most smartphones now use lithium batteries, and there are a lot of recyclable metal elements, most of which use cobalt oxide as the positive electrode and graphite as the negative electrode; some batteries will contain other metal elements, such as manganese instead of cobalt; The shell of the battery is generally aluminum. The recovery value of cobalt in batteries can reach hundreds of millions of yuan in the country every year. According to the average weight of each battery is about 20g, the cobalt content is about 3g or more, and more than 160kg of metal can be recovered per ton of waste batteries.

A mobile phone contains about 40 chemical elements, 50% of which can be recycled, mainly from circuit boards and mobile phone batteries. Professional recycling companies can extract about 150kg of aluminum, 100kg of copper, 5kg of tin, 3kg of silver, 2kg of rare earth elements, 150g of gold, and 50g of platinum from one ton of waste mobile phones.

Recycling used mobile phones is protecting our ecological environment. As we all know, with the intensification of global warming, the uncontrollability of environmental pollution is becoming more and more serious. Under such circumstances, recycling used mobile phones can prevent non-ferrous heavy metals from entering the soil and prevent tens of thousands of tons of electronic product waste from flowing into the natural environment. Therefore, the recycling of used mobile phones is of great significance.